diff --git a/config/plugins/visualizations/charts/static/app.js b/config/plugins/visualizations/charts/static/app.js
index 7dc9969fe43..3c95349c926 100644
--- a/config/plugins/visualizations/charts/static/app.js
+++ b/config/plugins/visualizations/charts/static/app.js
@@ -1,10 +1,10 @@
 // dependencies
 define(['library/portlet', 'library/ui', 'library/utils',
         'views/charts', 'views/viewport', 'views/chart', 'views/group',
-        'models/datasets', 'models/chart', 'models/charts', 'models/types'],
+        'models/config', 'models/datasets', 'models/chart', 'models/charts', 'models/group', 'models/types'],
         function(   Portlet, Ui, Utils,
                     ChartsView, ViewportView, ChartView, GroupView,
-                    Datasets, Chart, Charts, Types
+                    Config, Datasets, Chart, Charts, Group, Types
                 ) {
 
 // widget
@@ -19,10 +19,14 @@ return Backbone.View.extend(
         // link galaxy
         this.modal = parent.Galaxy.modal;
         
+        // create configuration model
+        this.config = new Config();
+        
         // create chart models
         this.types = new Types();
         this.chart = new Chart();
         this.charts = new Charts();
+        this.group = new Group();
         
         // create dataset handler
         this.datasets = new Datasets(this);
diff --git a/config/plugins/visualizations/charts/static/models/chart.js b/config/plugins/visualizations/charts/static/models/chart.js
index c729ab4c5a3..67e5c2fc4d5 100644
--- a/config/plugins/visualizations/charts/static/models/chart.js
+++ b/config/plugins/visualizations/charts/static/models/chart.js
@@ -22,8 +22,9 @@ return Backbone.Model.extend(
     // reset
     reset: function()
     {
-        this.clear().set(this.defaults);
+        this.clear({silent: true}).set(this.defaults);
         this.groups.reset();
+        this.trigger('reset', this);
     },
     
     // copy
diff --git a/config/plugins/visualizations/charts/static/models/config.js b/config/plugins/visualizations/charts/static/models/config.js
new file mode 100644
index 00000000000..2ac90f096ac
--- /dev/null
+++ b/config/plugins/visualizations/charts/static/models/config.js
@@ -0,0 +1,16 @@
+// dependencies
+define([], function() {
+
+
+// model
+return Backbone.Model.extend(
+{
+    // options
+    defaults : {
+        query_limit     : 20,
+        query_pace      : 1000,
+        query_max       : 5
+    }
+});
+
+});
\ No newline at end of file
diff --git a/config/plugins/visualizations/charts/static/models/group.js b/config/plugins/visualizations/charts/static/models/group.js
index 6727bbcb815..445e59cae79 100644
--- a/config/plugins/visualizations/charts/static/models/group.js
+++ b/config/plugins/visualizations/charts/static/models/group.js
@@ -1,23 +1,14 @@
 // dependencies
-define(['library/utils'], function(Utils) {
-
+define([], function() {
 
 // model
 return Backbone.Model.extend(
 {
-    // defaults
-    defaults : {
-    },
-    
-    // initialize
-    initialize: function(options)
-    {
-    },
-    
     // reset
     reset: function()
     {
-        this.clear().set(this.defaults);
+        this.clear({silent: true}).set(this.defaults);
+        this.trigger('reset', this);
     }
 });
 
diff --git a/config/plugins/visualizations/charts/static/views/chart.js b/config/plugins/visualizations/charts/static/views/chart.js
index 90ed350976e..02a443974d5 100644
--- a/config/plugins/visualizations/charts/static/views/chart.js
+++ b/config/plugins/visualizations/charts/static/views/chart.js
@@ -125,6 +125,9 @@ return Backbone.View.extend(
         this.chart.on('change:type', function(chart) {
             self.table.value(chart.get('type'));
         });
+        this.chart.on('reset', function(chart) {
+            self._resetChart();
+        });
         
         // collection events
         this.app.charts.on('add', function(chart) {
@@ -140,23 +143,17 @@ return Backbone.View.extend(
         });
         
         // reset
-        this.reset();
+        this._resetChart();
     },
 
     // reset
-    reset: function() {
-        this.chart.reset();
+    _resetChart: function() {
         this.chart.set('id', Utils.uuid());
         this.chart.set('dataset_id', this.app.options.dataset.id);
         this.chart.set('type', 'bardiagram');
         this.chart.set('title', 'Chart title');
     },
     
-    // set chart
-    setChart: function(new_chart) {
-        this.chart.copy(new_chart);
-    },
-    
     // create chart
     _saveChart: function() {
         // update chart data
diff --git a/config/plugins/visualizations/charts/static/views/charts.js b/config/plugins/visualizations/charts/static/views/charts.js
index 884e96b60b2..8e5b6b75c59 100644
--- a/config/plugins/visualizations/charts/static/views/charts.js
+++ b/config/plugins/visualizations/charts/static/views/charts.js
@@ -16,12 +16,12 @@ return Backbone.View.extend(
             ondblclick  : function(chart_id) {
                 // get chart
                 var chart = self.app.charts.get(chart_id);
-                                
+                self.app.chart.copy(chart);
+                               
                 // show edit
                 self.$el.hide();
                 
                 // update model and show create
-                self.app.chart_view.setChart(chart);
                 self.app.chart_view.$el.show();
             },
             onchange : function(chart_id) {
@@ -41,7 +41,7 @@ return Backbone.View.extend(
                             tooltip: 'Create',
                             onclick: function() {
                                 self.$el.hide();
-                                self.app.chart_view.reset();
+                                self.app.chart.reset();
                                 self.app.chart_view.$el.show();
                             }
                         }),
@@ -57,11 +57,11 @@ return Backbone.View.extend(
                                 
                                 // get chart
                                 var chart = self.app.charts.get(chart_id);
+                                self.app.chart.copy(chart);
                                 
                                 // show edit
                                 self.$el.hide();
                                 self.app.chart_view.$el.show();
-                                self.app.chart_view.setChart(chart);
                             }
                         }),
                 'delete' : new Ui.ButtonIcon({
diff --git a/config/plugins/visualizations/charts/static/views/group.js b/config/plugins/visualizations/charts/static/views/group.js
index b5ac01b0c71..d4de13ffc9c 100644
--- a/config/plugins/visualizations/charts/static/views/group.js
+++ b/config/plugins/visualizations/charts/static/views/group.js
@@ -1,13 +1,10 @@
 // dependencies
-define(['library/portlet', 'library/table', 'library/ui', 'library/utils', 'models/group'],
-        function(Portlet, Table, Ui, Utils, Group) {
+define(['library/portlet', 'library/table', 'library/ui', 'library/utils'],
+        function(Portlet, Table, Ui, Utils) {
 
 // chart config
 return Backbone.View.extend(
 {
-    // model
-    group: new Group(),
-    
     // columns
     columns: [],
     
@@ -18,6 +15,7 @@ return Backbone.View.extend(
     
         // get current chart object
         this.chart = this.app.chart;
+        this.group = this.app.group;
         
         // ui elements
         this.message = new Ui.Message();
@@ -69,6 +67,9 @@ return Backbone.View.extend(
         this.group.on('change', function() {
             self._refreshGroup();
         });
+        this.group.on('reset', function() {
+            self._resetGroup();
+        });
     },
     
     // show
@@ -77,8 +78,7 @@ return Backbone.View.extend(
     },
     
     // reset
-    reset: function() {
-        this.group.reset();
+    _resetGroup: function() {
         this.group.set('id', Utils.uuid());
         this.group.set('label', 'Group label');
     },
diff --git a/config/plugins/visualizations/charts/static/views/groups.js b/config/plugins/visualizations/charts/static/views/groups.js
index 9674edbfc77..bd155c53288 100644
--- a/config/plugins/visualizations/charts/static/views/groups.js
+++ b/config/plugins/visualizations/charts/static/views/groups.js
@@ -37,9 +37,9 @@ return Backbone.View.extend(
                             icon : 'fa-plus',
                             tooltip: 'Create',
                             onclick: function() {
+                                self.app.group.reset();
                                 self.app.chart_view.$el.hide();
                                 self.app.group_view.show();
-                                self.app.group_view.reset();
                             }
                         }),
                 'edit'  : new Ui.ButtonIcon({